Rotor salient pole type hybrid excitation motor based on magnetic gear

Abstract

The invention discloses a rotor salient pole type hybrid excitation motor based on a magnetic gear. The rotor salient pole type hybrid excitation motor based on the magnetic gear comprises an outer rotor, a permanent magnet, a stator, an armature winding, a supporting shaft and a bearing, wherein an inner ring of the outer rotor is provided with outer rotor salient poles which are arrayed at equal intervals and is connected with the supporting shaft of the motor through the bearing in a rotating mode; the stator is fixedly arranged through the supporting shaft of the motor; the permanent magnet is attached to the surface of a stator tooth of the stator and is opposite to the outer rotor; air gaps are formed between the outer rotor salient poles and the permanent magnet; the armature windings are wound around the stator tooth of the stator and are charged with alternating current. The salient pole type rotor is not provided with a permanent magnet, and a motor magnetic field is generated through the permanent magnet attached to the surface of the stator tooth and the excitation winding wound around the stator tooth, so that reliability of the motor is improved, the defect that a magnetic field of a traditional permanent magnet motor can not be adjusted is overcome, and the rotor salient pole type hybrid excitation motor based on the magnetic gear has the advantages of low-speed magnetism increasing and high-speed magnetism field weakening of a hybrid excitation type motor.

Description

technical field [0001] The invention relates to a rotor salient pole type hybrid excitation motor based on a magnetic gear, which belongs to the technical field of new special motors and is suitable for low-speed high-torque direct drive applications requiring high reliability and speed regulation performance. Background technique [0002] In industrial production, there are many occasions that require variable-speed drives. The variable-speed mechanical gearboxes often used have inherent defects: loud noise, serious mechanical wear, and regular maintenance. As a new type of non-contact gear structure that relies on magnetic field coupling to transmit torque, magnetic gears effectively improve the defects of traditional mechanical gears, and have the advantages of low noise, high reliability, maintenance-free, and automatic overload protection. Compared with other magnetic gear topologies, when the coaxial magnetic gear based on the principle of magnetic modulation harmonics...

AI Technical Summary

Problems solved by technology

[0002] In industrial production, there are many occasions that require variable speed drives. The variable speed mechanical gearboxes often used have inherent defects: loud noise, serious mechanical wear, and regular maintenance, etc.

However, the analysis found that no matter which of the above-mentioned structures is adopted, the outer rotor of the motor is prone to shedding of permanent magnets when rotating, which affects the reliability of operation, reduces the mechanical strength of the rotor, and limits the application of the motor.

In addition, because the traditional permanent magnet motor is only excited by the permanent magnet alone, the air gap magnetic field cannot be adjusted, which limits the motor's speed regulation range, torque output and fault-tolerant operation capability

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